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DIFFERENCE BETWEEN "J" , "O" AND "X" HEADS TO FIT 318

  
Mopar Muscle
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DIFFERENCE BETWEEN "J" , "O" AND "X" HEADS TO FIT 318

 
70coroneter 70coroneter
New User | Posts: 48 | Joined: 01/09
Posted: 03/31/09
06:48 PM

I AM TRYING TO DECIDE ON WHICH HEADS TO BEST SUIT MY 318 MOTOR FOR 70 CORONET, WHICH ONE OF THE FOLLOWING AND WHAT IS THE DIFFERENCE OF EACH  "J" , "O" AND "X" HEADS TO FIT 318 THAT WERE ORIGINALLY FACTORY INSTALLED ON THE 340 ENGINES.

THANKS
70CORONETER  

3404spdvaliant. 3404spdvaliant.
Guru | Posts: 771 | Joined: 12/07
Posted: 04/01/09
02:29 PM

Unless you have really good comp don't use 340-360 heads on yer 318.
And if you do have good comp, then stay away from 2.02 intake's go for the 1.78 or 1.88.  
age is no lock on brillance

Cudadon Cudadon
User | Posts: 204 | Joined: 02/08
Posted: 04/01/09
05:42 PM

The 915 or 587 are your best flowing stock heads.  Aero Heads has the best buy on these, ready to bolt on.  They come with 1.88/1.60 valves.

Don  

70coroneter 70coroneter
New User | Posts: 48 | Joined: 01/09
Posted: 04/03/09
04:20 PM

if I were to shave the heads can I still use the "O" heads. thanks for everyone input  

3404spdvaliant. 3404spdvaliant.
Guru | Posts: 771 | Joined: 12/07
Posted: 04/04/09
02:41 PM

If you want.  
age is no lock on brillance

70coroneter 70coroneter
New User | Posts: 48 | Joined: 01/09
Posted: 08/31/11
08:52 PM

aRE THE FOLLOWING HEADS GOOD FOR A 318 1970 MOTOR FOR B BODY "MOPAR 318 SWIRL PORT HEADS PART # 4323302" ALSO CAN i MOUNT A 4 bbl CARTER OR HOLLEY. THANKS